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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - virtio_xmit_cleanup failed when vm rx/tx queues from 1024 to 4096"
href="https://bugs.dpdk.org/show_bug.cgi?id=1716">1716</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>virtio_xmit_cleanup failed when vm rx/tx queues from 1024 to 4096
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>22.11
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>updoing@sina.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">Created <span class=""><a href="attachment.cgi?id=319&action=diff" name="attach_319" title="viritio patch">attachment 319</a> <a href="attachment.cgi?id=319&action=edit" title="viritio patch">[details]</a></span>
viritio patch
In a virtual machine scenario running a DPDK application with virtio drivers,
when the host machine adjusted the guest VM's transmit/receive queue size from
1024 to 4096, the DPDK application's allocated 2048 mbufs became insufficient.
After this adjustment, the condition vq->vq_nentries - vq->vq_free_thresh was
never triggered, resulting in the cleanup operation not occurring.
virtio_dev_rx_queue_setup the third param nb_desc is not used when
vq->vq_free_cnt great then nb_desc. vq->vq_free_cnt is assigned a value through
vq->n_nentries when virtio driver has inited. i40e driver vq has a nb_rx_desc
value, our dpdk app nb_desc setup 2048, malloc 2048 mbufs, so our dpdk app
rx/tx burst is failed on the line.
</pre>
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